| 水分胁迫对紫荆生理的影响 |
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| 引用本文： | 文瑛,廖飞勇.水分胁迫对紫荆生理的影响[J].北方园艺,2012(14):64-67. |
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| 作者姓名： | 文瑛 廖飞勇 |
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| 作者单位： | 中南林业科技大学风景园林学院,湖南长沙,410004;中南林业科技大学风景园林学院,湖南长沙,410004 |
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| 基金项目： | 湖南省"十二五"重点学科(风景园林学)资助项目，中南林业科技大学研究生科技创新基金资助项目，湖南省2011年研究生科研创新资助项目，湖南省教育厅资助项目 |
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| 摘 要： | 以2a生紫荆为试材,探讨水分胁迫对其生理的影响,为园林绿地中紫荆的灌溉提供理论指导。结果表明:水淹和干旱胁迫明显影响紫荆的生长。水淹4d后,表现为qP值、ETR值、净光合速率的明显下降,7d后植株死亡。处理20d后,干旱胁迫(土壤含水量低于8.1%)严重抑制植株的生长,表现为qP、ETR、Fv′/Fm′、Fv/Fm、叶片含水量、净光合速率的急剧降低,及Fo的升高,处理23d后植物死亡。长时间的中度干旱(含水量日变化在8%～15%之间)影响紫荆的生长,表现为qP值、ETR值、净光合速率、Trmmol偏低。轻度干旱适宜植物生长,表现为3次测定的qP、ETR、净光合速率都较高。土壤含水量日变化在15%～25%以内受轻度水分胁迫是园林中紫荆的最佳灌溉方式,既不影响景观效果,同时也能节约灌溉用水。
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| 关 键 词： | 紫荆 水分胁迫 光合速率 荧光参数 |
Effect of Water Stress on the Physiology of Cercis chinensis Bunge |
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| WEN Ying
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LIAO Fei-yong.Effect of Water Stress on the Physiology of Cercis chinensis Bunge[J].Northern Horticulture,2012(14):64-67. |
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| Authors: | WEN Ying LIAO Fei-yong |
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| Institution: | (College of Landscape and Architecture,Central South University of Forestry and Technology,Changsha,Hunan 410004) |
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| Abstract: | The effects of water stress on the two year old Cercis chinensis Bunge were tested for proving the irrigation guidance for its application in the garden.The results showed that the water stress and the drought stress suppressed the growth of Cercis chinensis Bunge.After treated with flooding for 4days,the qP,ETR,net photosynthetic rate were decreased,and the plants almost died after treated for 7days.After treated for 20days,the drought stress suppressed(the water content of soil remained below 8.1percent) the growth of plants,which was embodied in the increasing of qN,the decreasing of qP,ETR,Fv′ / Fm′,Fv / Fm,net photosynthetic rate and the plants almost died after treated for 23days.After treated for a long time,The mid drought stress(the water content of soil were between 8percent and 15percent) decreased the growth of plants,which was embodied in the decreasing of qP,ETR,net photosynthetic rate,Trmmol.The slight drought(the water content of soil were between 15percent and 25pecent) was adapt for Cercis chinensis Bunge,which was embodied in having the high qP,ETR and net photosynthetic rate in 3tested.The best irrigation for Cercis chinensis Bunge,was the water content of soil between 15percent and 25percent,which did not affect the ornamental value of Cercis chinensis Bunge,and save the irrigation water. |
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| Keywords: | Cercis chinensis Bunge water stress photosynthesis rate fluorescence parameters |
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